Question

define enthalpy of atomization​

Answer 1

Answer:

Enthalpy of atomisation

The enthalpy of atomisation of an element is the enthalpy change when 1 mole of  gaseous atoms is formed from the element in its standard state

Na (s) = Na(g) [ΔatH = +148 kJ mol-1]

½ O2 (g) = O (g) [ΔatH = +249 kJ mol-1]

Answer 2

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The enthalpy of atomization is the enthalpy change that accompanies the total separation of all atoms in a chemical substance. This is often represented by the symbol ΔₐₜH or ΔHₐₜ. All bonds in the compound are broken in atomization and none are formed, so enthalpies of atomization are always positive.